S-93413A211 4.3 mm ID x 12 mm OD DIN 9021, ISO 7093 Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with black-coated steel construction for extended service life in demanding environments
• Precise M4 compatibility with 4.3mm inner diameter ensuring perfect fit and optimal load distribution
• Enhanced surface durability with Rockwell B56 hardness rating for resistance against wear and deformation
• International standard compliance meeting both DIN 9021 and ISO 7093 specifications for global project compatibility
• Reliable dimensional stability with 12mm outer diameter and 0.9-1.1mm thickness for consistent performance
• Environmental regulation compliance with RoHS 3 and REACH adherence for safe use in regulated industries
• Optimized load distribution through flat washer design that prevents surface damage and maintains joint integrity

Professional Applications & Engineering Value

These M4 metric flat washers provide critical engineering solutions where corrosion resistance and dimensional precision are paramount. The black corrosion-resistant coated steel construction specifically addresses common industrial challenges like moisture exposure, chemical contact, and atmospheric corrosion that compromise fastener integrity. Engineered to DIN 9021 and ISO 7093 standards, these washers deliver consistent performance in industrial applications including machinery assembly, electrical enclosures, and automotive components. The precise 4.3mm inner diameter ensures perfect alignment with M4 fasteners, preventing thread damage while the 12mm outer diameter provides optimal surface coverage. This combination of material properties and dimensional accuracy makes them ideal for applications requiring reliable fastening solutions that maintain structural integrity under vibration and load stress.

Specification Summary & Compliance

This flat washer features precise metric dimensions with 4.3mm inner diameter, 12mm outer diameter, and 0.9-1.1mm thickness range. Manufactured to exacting DIN 9021 and ISO 7093 standards, it ensures dimensional consistency and performance reliability. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and safety requirements for industrial components. The Rockwell B56 hardness specification guarantees mechanical durability while the corrosion-resistant coating provides long-term protection in various operating conditions.